<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>
        <a href="/">商品管理</a>
      </el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row>
        <el-col>
          <!-- 添加按钮 -->
          <el-button type="primary" @click="showAddDialogVisible">添加分类</el-button>
        </el-col>
      </el-row>
      <!-- 表格 -->
      <tree-table
        class="treeTable"
        :data="catelist"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        index-text="#"
        border
      >
        <template v-slot:isok="scope">
          <i
            class="el-icon-success"
            v-if="scope.row.cat_deleted === false"
            style="color: lightgreen"
          ></i>
          <i class="el-icon-error" v-else style="color: red"></i>
        </template>
        <template v-slot:order="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag size="mini" type="success" v-else-if="scope.row.cat_level === 1">二级</el-tag>
          <el-tag size="mini" type="warning" v-else>三级</el-tag>
        </template>
        <template v-slot:opt="scope">
          <el-button @click="getEditCate(scope.row.cat_id)" type="primary" size="small" icon="el-icon-edit">编辑</el-button>
          <el-button type="danger" size="small" icon="el-icon-delete" @click="removeCateById(scope.row.cat_id)">删除</el-button>
        </template>
      </tree-table>
      <!-- 分页 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[3, 5, 10, 15]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      ></el-pagination>
      <!-- 添加按钮对话框 -->
      <el-dialog
        title="提示"
        :visible.sync="addCateDialogVisible"
        width="50%"
        @close="addCateDialogClose"
      >
        <el-form ref="addCateformRef" :model="addCateform" :rules="addCateRules" label-width="80px">
          <el-form-item label="分类名称" prop="cat_name">
            <el-input v-model="addCateform.cat_name"></el-input>
          </el-form-item>
          <!-- 层级选择器 -->
          <el-form-item label="父级分类: ">
            <!-- options用来指定数据源 -->
            <!-- props用来指定配置对象 -->
            <el-cascader
              style="height: 100px"
              v-model="selectedKeys"
              change-on-select
              :options="parentCateList"
              :props="cascaderProps"
              @change="parentCateChanged"
              clearable
            ></el-cascader>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="addCateDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="addCate">确 定</el-button>
        </span>
      </el-dialog>
        <!-- 编辑角色对话框 -->
      <el-dialog title="修改分类" :visible.sync="editCateDialogVisible" width="50%" @close="editCateDialogClosed">
        <el-form :model="editCate" :rules="editCateRules" ref="editCateRef" label-width="100px">
          <el-form-item label="分类名称" prop="cat_name">
            <el-input v-model="editCate.cat_name"></el-input>
          </el-form-item>
        </el-form>
        <span slot="footer" class="dialog-footer">
          <el-button @click="editCateDialogVisible = false">取 消</el-button>
          <el-button type="primary" @click="editCateInfo">确定</el-button>
        </span>
      </el-dialog>
    </el-card>
  </div>
</template>


<script>
export default {
  data() {
    return {
    // 编辑
      editCate: {},
      editCateDialogVisible: false,
      editCateRules: {
        cat_name: [
          { required: true, message: "请输入分类名称", trigger: "blur" }
        ],
      },
      queryInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5
      },
      catelist: [],
      total: 0,
      columns: [
        {
          label: "分类名称",
          prop: "cat_name"
        },
        {
          label: "是否有效",
          type: "template",
          template: "isok"
        },
        {
          label: "排序",
          type: "template",
          template: "order"
        },
        {
          label: "操作",
          type: "template",
          template: "opt"
        }
      ],
      addCateDialogVisible: false,
      addCateform: {
        cat_name: "",
        cat_pid: 0,
        cat_level: 0
      },
      addCateRules: {
        cat_name: [
          { required: true, message: "请输入分类名称", trigger: "blur" }
        ]
      },
      // 父级分类列表
      parentCateList: [],
      // 指定级联选择器的配置对象
      cascaderProps: {
        expandTrigger: "hover",
        value: "cat_id",
        label: "cat_name",
        children: "children"
      },
      // 选中的父级分类id数组
      selectedKeys: []
    };
  },

  created() {
    this.getCateList();
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get("categories", {
        params: this.queryInfo
      });
      if (res.meta.status !== 200) {
        return this.$message.error("获取商品分类失败");
      }
      this.catelist = res.data.result;
      this.total = res.data.total;
    },
    handleSizeChange(newSize) {
      this.queryInfo.pagesize = newSize;
      this.getCateList();
    },
    handleCurrentChange(newPage) {
      this.queryInfo.pagenum = newPage;
      this.getCateList();
    },
    showAddDialogVisible() {
      this.getParentCateList();
      this.addCateDialogVisible = true;
    },
    // 获取父级分类的数据列表
    async getParentCateList() {
      const { data: res } = await this.$http.get("categories", { type: 2 });
      if (res.meta.status !== 200) {
        this.$message.error("获取父级列表失败");
      }
      this.parentCateList = res.data;
    },
    // 选择项发生变化触发该方法
    parentCateChanged() {
      // 如果selectedKays数组中的length大于0,证明选中父级分类
      if (this.selectedKeys.length > 0) {
        this.addCateform.cat_pid = this.selectedKeys[
          this.selectedKeys.length - 1
        ];
        this.addCateform.cat_level = this.selectedKeys.length;
        return;
      } else {
        // 父级分类的ID
        this.addCateform.cat_pid = 0;
        // 为当前分类的等级赋值
        this.addCateform.cat_level = 0;
      }
    },
    // 点击按钮添加分类
    addCate() {
      this.$refs.addCateformRef.validate(async valid => {
        if (!valid) return;
        const { data: res } = await this.$http.post(
          "categories",
          this.addCateform
        );
        if (res.meta.status !== 201) {
          return this.$message.error("添加分类失败");
        }
        this.$message.success("添加分类成功");
        this.getCateList();
        this.addCateDialogVisible = false;
      });
    },

    // 监听关闭添加分类对话框
    addCateDialogClose() {
      this.$refs.addCateformRef.resetFields();
      this.selectedKeys = [];
      this.addCateform.cat_level = 0;
      this.addCateform.cat_pid = 0;
    },
    // 编辑商品分类
    async getEditCate(id) {
        this.editCateDialogVisible = true;
        const { data : res} = await this.$http.get("categories/" + id)
        if(res.meta.status !== 200) {
            return this.$message.error("获取商品id失败")
        }
        this.editCate = res.data
    },
    editCateInfo() {
        this.$refs.editCateRef.validate(async valid => {
            if(!valid) return;
            // 发起编辑商品分类请求
            const { data:res } = await this.$http.put("categories/" + this.editCate.cat_id,{cat_name: this.editCate.cat_name});
            console.log(res)
            if(res.meta.status !== 200) {
               return this.$message.error("编辑商品分类失败")
            }
            this.editCateDialogVisible = false
            this.getCateList()
            this.$message.success("编辑商品分类成功")
        })
    },
    editCateDialogClosed() {
        this.$refs.editCateRef.resetFields()
    },
    // 删除商品分类
    async removeCateById(id) {
        const confirmResult = await this.$confirm(
            "此操作将永久删除该分类,是否继续?",
            "提示",
            {
                confirmButtonText: "确定",
                cancelButtonText: "取消",
                type: "warning"
            }
        ).catch(err => err);
        if(confirmResult !== "confirm") {
            return this.$message.info("已取消删除")
        }
        const { data:res } = await this.$http.delete("categories/" + id)
        if(res.meta.status !== 200) {
            return this.$message.error("删除分类失败");
        }
        this.$message.success("删除分类成功");
        this.getCateList();

    }
  }
};
</script>


<style lang="less">
.treeTable {
  margin-top: 15px;
}
.el-cascader {
  width: 100%;
  height: 30px !important;
}
.el-cascader-menu {
  height: 300px;
}
</style>